they call the 3 ds. dissatisfied, disappointed and disenchanted obama voters. it's about convincing them that over the next four years, you will do a better job to improve their lives. what they're looking for is those, that narrower and narrower slice of swing voters. i mean, he's got a double job to do. >> he had a convention speech and he wasn't able to do it. >> that's why he's got to do it tonight. so but he's got a double job. he's got to talk to those swing voters who are disaffected about president obama, but then make sure his base turns out and he's got to get the base enthusiastic. now, what the base wants and those swing voters want maybe two different things. >> but how many people are still undecided? >> this many. >> but there are still people who are persuadable. >> have debates really persuaded them. >> john kerry, going into that first debate, was seven points behind. after that first debate, he was only two points behind. now, we know he ended up losing because president bush came back and did a better job in the second debate. but it did narrow the gap for john kerry.